Credibility, Identity Resolution, and Privacy on Online Social Media
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Credibility, Identity Resolution, and Privacy on Online Social Media Indo Belarus Bilateral Workshop on Cyber Security CDAC Noida Nov 16, 2016 Ponnurangam Kumaraguru (“PK”) Associate Professor ACM Distinguished Speaker fb/ponnurangam.kumaraguru, @ponguru
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Transcript of Credibility, Identity Resolution, and Privacy on Online Social Media
Credibility, Identity Resolution, and Privacy on Online Social
Media Indo Belarus Bilateral Workshop on Cyber Security
CDAC Noida Nov 16, 2016
Ponnurangam Kumaraguru (“PK”)Associate Professor
ACM Distinguished Speakerfb/ponnurangam.kumaraguru, @ponguru
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Who am I? Associate Professor, IIIT-Delhi Ph.D. from School of Computer Science,
Carnegie Mellon University (CMU) Research interests
- Social Computing, Computational Social Science, Complex Networks pertaining to Human Behavior, specifically in the context of Security & Privacy
Co-ordinate and manage Precog, precog.iiitd.edu.in
ACM Distinguished Speaker
https://www.youtube.com/channel/UCHWDvGDh4QjWbV79bM2neSg
What we dabble with!
https://arxiv.org/pdf/1611.01911v2
http://labs.precog.iiitd.edu.in/killfie/
https://arxiv.org/pdf/1610.07772v1.pdf
http://precog.iiitd.edu.in/Publications_files/aa-spyingextensions.pdf
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Non-trustworthy Content
FAKE
$
#ChennaiFloodsRUMORS
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Methodology
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Training Data 500 Tweets per event Used CrowdFlower
Event Tweets UsersBoston Marathon Blasts (2013) 7,888,374 3,677,531
Typhoon Haiyan / Yolanda (2013) 671,918 368,269
Cyclone Phailin (2013) 76,136 34,776
Washington Navy yard shootings (2013) 484,609 257,682
Polar vortex cold wave (2014) 143,959 116,141
Oklahoma Tornadoes (2013) 809,154 542,049
Total 10,074,150 4,996,448
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Credibility Modeling Feature set Features (45)
Tweet meta-data Number of seconds since the tweet; Source of tweet (mobile / web/ etc); Tweet contains geo-coordinates
Tweet content (simple)
Number of characters; Number of words; Number of URLs; Number of hashtags; Number of unique characters; Presence of stock symbol; Presence of happy smiley; Presence of sad smiley; Tweet contains `via'; Presence of colon symbol
Tweet content (linguistic)
Presence of swear words; Presence of negative emotion words; Presence of positive emotion words; Presence of pronouns; Mention of self words in tweet (I; my; mine)
Tweet author Number of followers; friends; time since the user if on Twitter; etc.
Tweet network Number of retweets; Number of mentions; Tweet is a reply; Tweet is a retweet
Tweet links WOT score for the URL; Ratio of likes / dislikes for a YouTube video
Implementation
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Feedback by Users
v
Harvard (1839) – Harvard – Harvard – Harvard – MIT – Northwestern – UIUC – WUSL – CMU (2009) – IIITD (2015)
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http://twitdigest.iiitd.edu.in/TweetCred/
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De-duplicating audience
Social audience = 437,632 + 153,000 + 805,097 or less??
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Challenges
ProfessionalOpinion
Dating
Heterogeneous OSNs
Personal
Degree of Details
Quality and descriptive personal And professional information
Little personal information Descriptive opinions
Attribute Evolution
Time
Information evolved on one but not on other
{jainpari, Bangalore}
Registration with same information on both OSNs{paridhij, New Delhi}
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Generic Identity Resolution
Extract available &
discriminativefeatures
Candidate Identities
IDENTITY SEARCH IDENTITY LINKING
Pairwise Comparisons
cerc.iiitd.ac.in22
Heuristic Identity Search
Paridhi Jain, Ponnurangam Kumaraguru, and Anupam Joshi. 2013. @I seek ‘fb.me’: Identifying Users across Multiple Online Social Networks. In Proceedings of the 22nd International Conference on World Wide Web, WWW ’13 Companion. ACM, New York, NY, USA, 1259- 1268. DOI=http://dx.doi.org/10.1145/2487788.2488160 [Honorable Mention Award}
Harvard (1839) – Harvard – Harvard – Harvard – MIT – Northwestern – UIUC – WUSL – CMU (2009) – IIITD (2016)
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How many of you have posted mobile numbers on Online Social
Networks?
How many of you have seen mobile numbers being posted on
Online Social Networks?
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Sample posts
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Sample posts
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Sample posts
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Sample posts
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Data statistics Twitter: 12th October 2012 – 20th October 2013 Facebook: 16th November 2012 – 20th April 2013
Numbers Category +91 Category 0 Category void Total
Twitter Facebook Twitter Facebook
Twitter Facebook Twitter Facebook
Mobile Numbers
885 2,191 14,909 8,873 25,566 25,294 41,360 36,358
User profiles
1,074 2,663 17,913 9,028 31,149 25,406 49,817 36,588
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SocialCaller App
https://play.google.com/store/apps/details?id=com.ayush.socialcaller&hl=en
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Takeaways Online Social Media is a different beast in
terms of privacy, identity, and credibility- Research / technologies should be developed
Multiple interesting research, engineering, and innovation waiting to be done
Interested in hosting students – B.Tech., M.Tech., Ph.D.
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https://www.facebook.com/PreCog.IIITD/
